Earlier studies have shown that people who participate in surveys (such as CCFA Partners) may respond better to survey requests if these have a time limit (such as telling participants that surveys need to be done in 72 hours). This is called "scarcity." Other ways to improve survey response include messages targeting: paying it forward (that what you are doing will help people in the future), guilt, altruism (helping others), and self-serving (helping yourself). Our goal was to see if scarcity or these messages improved response rates within CCFA Partners. The scarcity group received a 'warning' email informing them that they will be sent a survey link the next day, and that they will have 72 hours to complete the survey. The control group received no warning email. We also tested the four different messages described above and a "control" message that just informed patients that it was time for their survey. We sent emails to a total of 8697 people within CCFA Partners asking them to complete their follow-up surveys. Of these, 2965 started their follow up survey. There was no difference between those in the 'scarcity group' as compared to control group. Scarcity was, however, more effective in the >50 age group. Of the messages, guilt resulted in a significantly higher response rate, while the other messages were no different than control. In summary, behavioral interventions applied to an internet-based IBD cohort have little benefit in improving response rates. Guilt had the strongest effect. The reasons that the other messages did not work may be that these interventions don't apply in an IBD population, that e-mail messages are not as effective, or that members of CCFA Partners are already very motivated to fill out surveys.